I'm greedy.
What if Blue and Mafah are both legit?
Not necessarily as individuals but as a duo that forms a great 1-2 punch...
Or let's say, a great 2-3 punch. That is, one of the veteran free agents is the starter with serious carries going to Blue or Mafah, depending on the circumstances.
When the opponent defense becomes fatigued, you send in Blue to run all over the field.
When you want to score in the redzone or protect a lead and take time off the clock you roll in Mahfa.
Depending on productivity, if the two rookies are legit, then they would eventually evolve into the 1-2 punch.